Add HyperFrames skills (from heygen-com/hyperframes, Apache-2.0)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FXVsD1DgdzZLiPuwtKzMSY

.claude/skills/media-use/audio/scripts/lib/audio-meta.mjs

@@ -0,0 +1,39 @@
+import { closeSync, ftruncateSync, openSync, readFileSync, writeSync } from "node:fs";
+
+// Keep the merge base and output on the same file even if its pathname changes
+// while audio generation runs. The CLI owns this handle until write or exit.
+export function openAudioMeta(path) {
+  let fd;
+  try {
+    fd = openSync(path, "r+");
+  } catch (error) {
+    if (error.code !== "ENOENT") throw error;
+  }
+  let value = {};
+  if (fd !== undefined) {
+    try {
+      value = JSON.parse(readFileSync(fd, "utf8"));
+    } catch (error) {
+      closeSync(fd);
+      throw error;
+    }
+  }
+  return {
+    value,
+    write(meta) {
+      const bytes = Buffer.from(JSON.stringify(meta, null, 2));
+      // Defer new-file creation until generation succeeds. Never overwrite a
+      // file (or follow a link) that appeared since the missing merge base.
+      if (fd === undefined) fd = openSync(path, "wx");
+      try {
+        let offset = 0;
+        while (offset < bytes.length) {
+          offset += writeSync(fd, bytes, offset, bytes.length - offset, offset);
+        }
+        ftruncateSync(fd, bytes.length);
+      } finally {
+        closeSync(fd);
+      }
+    },
+  };
+}